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To connect  ADF5901 Aux outputs to ADF4195 REF-IN inputs.

Question asked by lux on Aug 20, 2017
Latest reply on Aug 21, 2017 by Ruairí

Hello,

Need some help with the ADF5901 AUX/AUX BAR outputs to drive the ADF4195 REF-IN A/REFIN-B inputs.

Questions:

When the ADF5901 AUX/AUX BAR outputs to drive the ADF4195 REF-IN A/REFIN-B inputs diffrentially on a PCB

 at 12GHz rate by DC-cutting with two 22pf caps,

Q1:   Should a  200 ohm micro-strip line technique be used on the PCB?

( "200 ohm" comes from the data sheet  electrical specification for the ADF5901 AUX/AUX BAR output imepedance.)

Q2: Is 22pf proper value for the DC-cutting caps?   If not , what would be a  better value?

Q3:  If the answer to Q1 is "yes", what would be the limitation for the length of the PCB traces?

Thanks!

Best Regards,

Lux

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